Chemical freezing package



A. A. ROBBINS CIrIEMICAL FREEZING PACKAGE,

Aug. 11, 1959 2 Sheets-Sheet 2.

Filed June 15; 1956 United States Patent Ofiice 2,898,744 Patented Aug.11, 1959 CHEMICAL FREEZING PACKAGE Albert A. Robbins, West Covina, Califassignor, by mesne assignments, to Kwik-Kold of America, Inc., LasVegas, Nev., a corporation of Nevada Application June .15, 1956, SerialNo. 591,758

3 Claims. (Cl. 62-4) This invention relates to a chemical freezingpackage, and particularly to a package in which the chemicals can beeasily and simply mixed when it is desired to reduce the temperature ofthe package.

An object of my invention is to provide a chemical freezing packageconsisting of an outer envelope with compartments therein, and with aphysical means within one of the compartments which perforates or seversthe wall :or partition between the compartments.

Another object of my invention is to provide anovel chemical freezingpackage, including an outer or main envelope, and with a toothed orpointed frame in one compartment which enables the user to perforate orsever the wall or division between the compartments of the package.

Still another object of my invention is to provide a novel chemicalfreezing package in which the separated ingredientsof the package can beintermingled by manually-causing theseparating wall or division in thepackage to be broken or -perforated, said perforation or severingof thedividing wall or sealed strip being accomplished manually by the user,the user actuating a pointed frame or article within one of thecompartments of the package.

Other objects, advantages and features of invention may appear from theaccompanying drawing, the subjoined detailed description and theappended claims.

In the drawing- Figure 1 is a side elevation of one form of my chemicalfreezing package with parts broken away to show interior construction.

Figure 2 is a fragmentary side view of the modification shown in Figure1 and illustrating the means to perforate or break a wall of thepackage.

Figure 3 is a side elevation of a modified form of my freezing package.

Figure 4 is a fragmentary side elevation of the modification shown inFigure 3 and illustrating the breaking or perforating of the separatingseam or strip.

Figure 5 is a perspective view of a modified form of my invention.

Figure 6 is a side elevation of the modified form of my invention shownin Figure 5.

Figure 7 is a top plan view of the modified form of my invention withthe back extended horizontally.

While it is well known in the chemical art that certain chemicals absorbheat when water is added thereto, this heat being obtained from adjacentbodies by means of conduction, convection or radiation, or possibly allthree; these so-called freezing mixtures will be so termed in thefollowing specification and may include any of the following chemicals,or many others having the same property. Some of these freezing mixtureshave the following formulae:

NaC H O NI-I Cl NaNO3 N32820:;

CaCl Memo,

The addition of water to any of these chemicals will cause a markedreduction in temperature in the surrounding air or to adjacent articles.Consequently, a package containing any of the freezing mixtures whenenclosed in a box, carton, hamper, or container Will lower thetemperature therein and will maintain a low temperature in foods,liquids, cans, bottles, etc., which are placed within the containers,etc.

In order that the freezing package may be easily transported and,further, that it may be activated to reduce temperature at any timedesired, I provide a chemical freezing package as follows: An outerenvelope or housing 1 is preferably formed of a plastic sheet material,such as polyethylene, vinyl or acetate. This plastic sheet material isusual and well known in the industry and the sheets are formed ofsuflicient thickness so that they will not readily tear or break.Further, the plastic sheet is sufficiently dense so that gases will notreadily pass therethrough. By gases is meant ammonia, chlorine, etc. Theenvelope 1 is preferably formed by heat sealing the edges 2, or by meansof a suitable adhesive sothat a completely enclosed envelope isprovided. The envelope 1 is filled with .a salt 3, which is termed afreezing mixture as specified above. Within the envelope 1 I provide asecond envelope or compartment 4. This lastnamed envelope is also formedof a suitable plastic sheet material, such as ployethylene, vinyl oracetate, and the walls thereof are sufficiently thin so that it may bebroken or perforated in a manner to be subsequently described. Thecompartment 4 is preferably filled with water, or with a hydrouschemical, such as sodium carbonate (NA CO with 51OH20); for-example, thewater in the hydrous chemical being sufficient to activate the freezingmixture. Within the envelope or compartment 4- I provide a comblikeframe 5 which is formed with sharp teeth or projections 6. Manualpressure on the top of the frame 5 will cause the teeth 6 to break orperforate the wall of the envelope 4, thus permitting the water or ahydrous chemical to admix with the freezing mixture 3, thus reducing thetemperature of the freezing package. If desired one edge of the envelope4 may be sealed with the envelope 1, as shown at 7, so that the envelope4 will vbe held substantially immovable within the envelope 1.

In the modification, shown in Figures 4 and 5, the outer envelope 8 isformed of a plastic sheet material, such as polyethylene, vinyl oracetate, and the outer edges 9 are sealed either by means of heat orpressure, or by means of a suitable adhesive. A sealed strip 10 dividesthe envelope 8 into two compartments 11 and 12. The sealed strip 10 isformed by a heated iron or sealing instrument, or by applying anadhesive, so that the compartments 11 and 12 are separate and distinct.The compartment 11 may contain water and the compartment 12 contains afreezing mixture, for the same purpose as previously described. Topermit the intermingling of the water and the freezing mixture I againprovide a frame 13 which is formed with pointed or sharp comb-likefingers 14 which normally rest on the dividing strip ll), as shown inFigure 3. By applying manual pressure to the top of the frame 3 thefingers 14 are forced through the dividing strip 10, thus providingcommunication between the compartments 11 and 12 and permitting theWater to drain into the freezing mixture and mix therewith.

In the modification shown in Figures 5, 6 and 7 the outer envelope 15 isformed of a plastic sheet material such as polyethylene, vinyl oracetate, and the outer edges 16 are sealed together by means of heat orpressure or by means of a suitable adhesive. A sealed strip 17 dividesthe envelope 15 into two compartments 18 and 19. The sealed strip 17 isformed by placing a release type coating on the inside of the plasticsheet which forms the envelope and subsequent heat and pressure willseal the strip 17, thus forming the two compartments 18 and 19. Thecompartment 18 is preferably filled with water, while the compartment 19is filled with a freezing mixture for the same purpose as previouslydescribed. The sealed strip 17, which is of the release type aspreviously described, may be broken, separated or fractured by exertingpressure on the envelope 15 and preferably by exerting pressure on thewater compartment 18.

In order that a transportable package may be provided I fold theenvelope 15 along the sealed strip 17 and with that sealed strip at thetop of the fold a paper strip or handle 20 is attached to the outside ofthe envelope 15 and along the sealed strip 17, thus tending to hold theenvelope 15 in its folded position as shown in Figure 5. The handle 20may also be formed with a slot 21 therein to facilitate carrying theenvelope. The lower edges 22 of the handle 20 are glued or otherwiseattached to the outer surface of the envelope 15 adjacent the sealingstrip 17 so that the envelope tends to remain in a folded position asshown in Figure 5. The envelope, however, can be flattened or placed ina horizontal position as shown in Figure 7, and in this fiat positionthe sealing strip 17 may be separated, fractured or broken for thepurpose of interrningling the water and the freezing mixture.

Having described my invention, I claim:

1. A chemical freezing package comprising an outer envelope hermeticallysealed on all of the edges thereof, said envelope being formed of athin, flexible, plastic sheet material, a second envelope within saidouter envelope, said second envelope being also hermetically sealed atall of the edges thereof, said outer envelope containing a dry freezingchemical mixture therein, said second envelope containing a quantity ofWater therein, and means positioned entirely within said second envelopeadapted to perforate a wall of the second envelope to permitintermingling of the water and the freezing chemical mixture.

2. A chemical freezing package comprising an outer envelope hermeticallysealed on all of the edges thereof, said envelope being formed of athin, flexible, plastic sheet material, ,a second envelope. within, saidouter envelope, said second envelope being also hermetically sealed atall of the edges thereof, said outer envelope containing a .dry freezingchemical mixture therein, said second envelope containing a quantity ofWater therein, one edge of said second envelope being fixedly attachedto one edge of the outer envelope to restrain movement of the secondenvelope in the outer envelope, and means positioned entirely withinsaid second envelope adapted to perforate a wall ofrthe second envelopeto permit intermingling of the water and the freezing chemical mixture.

3. A chemical freezing package comprising an outer sealed envelope,another sealed envelope Within the outer sealed envelope, said outerenvelope containing a dry freezing chemical mixture and said innerenvelope containing a quantity of water, a frame within the inner sealedenvelope, said frame including sharpened projections thereon, theprojections being adapted and arranged to pierce the wall of the innerenvelope and permit intermingling of the water and the dry freezingchemical mixture.

References Cited in the file of this patent UNITED STATES PATENTS1,897,723 Free Feb. 14, 1933 2,300,793 Martin Nov. 3, 1942 2,515,840Rodeck July 18, 1950 2,714,974 Sawyer Aug. 9, 1955 2,746,265 Mills May22, 1956

